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Winner of the CHEMISTRY category and BEST DANCE of 2010 : Maureen McKeague dances her PhD, “Selection of a DNA aptamer for homocysteine using Systematic Evolution of Ligands by Exponential Enrichment.” Here is McKeague’s explanation of her dance . Winner of the PHYSICS category: Australian physicist Steven Lade dances “Directed transport without net bias in physics and biology.” Here is Lade’s explanation of his dance . Winner of the BIOLOGY category: Maartje Cathelijne de Jong dances her PhD, “The influence of previous experiences on visual awareness.”
Sans physique quantique pas de laser ni de microscope à effet tunnel Véritable révolution, née au début du XXe siècle, la physique quantique est à la base de grandes découvertes. Elle décrit le monde invisible des atomes, électrons et molécules. Elle introduit des notions fondamentales comme la dualité onde-corpuscule, l'équation de Schrödinger, les relations d'incertitude d'Heisenberg. Mais quelles sont les applications de la physique quantique ? Albert Einstein, en 1917, expliquant "l'émission stimulée", phénomène qui sous-tend le principe du laser est, en partie, à l'origine d'une innovation qui va révolutionner le monde industriel, médical...Le microscope à effet tunnel, découvert en 1986, par deux ingénieurs a permis d'explorer la matière atome par atome.
quantique et design
Electrons (blue balls) and holes (red balls) show random thermal motion before the terahertz pulse hits the sample. Copyright: MBI Researchers at the Max-Born-Institute, Berlin, Germany, observed the extremely fast onset of electrical resistance in a semiconductor by following electron motions in real-time. When you first learned about electric currents , you may have asked how the electrons in a solid material move from the negative to the positive terminal.
How the Princess began to Feel the Pea. Science is exciting because it is always in trouble. No matter how excellent a theory is, it always misses some point or other.
@ mazimazo : "couldn't the EPR paradox be kind of experimented ? if only in a thought experiment ?" The EPR paradox *is* a thought experiment.
[ edit ] what about death Doesn't this idea assume that death is the end of conciousness? I don't think that is relevant.
Quantum world is actually not weird at all. Double slit situation- An electron is apparently surrounded by a cloud of virtual particles that pop in and out of existence. Virtual particles are particle/ antiparticle pairs (electrons/ positrons) that get created from the 'vacuum' and disappear by annihilating each other. If this picture is true, the created particle/ antiparticle pairs may not adhere to and behave with sanctity and it is possible that the original electron may get annihilated by one of the virtual positrons created 'next' to it.
Photograph of the quantum machine developed by O'Connell. The mechanical resonator is located to the lower left of the coupling capacitor (small white square). The qubit is connected to upper right of the coupling capacitor. A quantum machine is a human-made device whose collective motion follows the laws of quantum mechanics . The idea that macroscopic objects may follow the laws of quantum mechanics dates back to the advent of quantum mechanics in the early 20th century. [ 1 ] [ 2 ] However, as highlighted by the Schrödinger's cat thought experiment , quantum effects are not readily observable in large-scale objects. Consequently, quantum states of motion have only been observed in special circumstances at extremely low temperatures.
Quantum mechanics lays out a set of mind-bending rules on how very small things move and behave, such as their ability to absorb energy only in discrete amounts (or quanta) and be in two different states at the same time. Although, so far, quantum effects have been observed primarily in molecules, atoms, and subatomic particles, physicists have been putting much effort into observing quantum mechanics in systems closer to human scale. Such efforts are starting to pay off. Working with Andrew Cleland and John Martinis at the University of California (UC), Santa Barbara, earlier this year, Ph.D. student Aaron O'Connell became the first person to experimentally induce and measure quantum effect in the motion of a humanmade object.